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Clay-filled starch films. Part I: Effect of clay kind and glycerol concentration on functional properties of composites
Abstract
The aim of this work was to improve the mechanical and water barrier properties of composite filmsprepared from starch and clays, plasticized with glycerol at different concentrations. The effects ofhydrophilic Closite Naþand Nanomer PGV were compared with that exerted by organicallymodifiedmorehydrophobicNanofil2 and NanoBent ZR-1. The antimicrobial activity of compositescontaining hydrophobic clays was also investigated. The hydrophilic Nanomer PGV atconcentrations of 5–10%increased the tensile strength (TS) of unplasticized composites, butstarch-Closite Naþcomposites were too brittle to measure their mechanical properties. Thehydrophobic clays did not improve the mechanical properties of the unplasticized composites. Inthe presence of glycerol at concentrations of 20–30%, TS of composites containing hydrophilic claysand even hydrophobic NanoBent ZR-1 increased in comparison to plasticized filmswithout clay.Noneof the claysimproved the waterbarrier propertiesof the unplasticized composites,while in theplasticized composites all the clays decreased the water vapor permeability to an extent dependenton the kind and concentration of clay and glycerol concentration. Starch-NanoBentZR-1 compositeshowed very high activity against gram-positive Staphylococcus aureus and Listeria innocua. Starch-Nanofil2 composites were characterized by smaller activity. Neither composite showed anyantimicrobial activity, or their activity against gram-negative bacteria was low.
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
STARCH-STARKE
no. 69,
edition 1-2,
pages 1 - 8,
ISSN: 0038-9056 - Language:
- English
- Publication year:
- 2017
- Bibliographic description:
- Staroszczyk H., Gottfried K., Malinowska-Pańczyk E., Kołodziejska I.: Clay-filled starch films. Part I: Effect of clay kind and glycerol concentration on functional properties of composites// STARCH-STARKE. -Vol. 69, iss. 1-2 (2017), s.1-8
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/star.201500325
- Verified by:
- Gdańsk University of Technology
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